ZN63(VS1)-12 Indoor 11kV Vacuum Circuit Breaker

Compact 11kV VCB for Metal-Clad Switchgear and Fixed Panels

The ZN63(VS1)-12 indoor vacuum circuit breaker is designed for 11kV medium voltage systems, offering reliable interruption performance, compact structure, and compatibility with both fixed and withdrawable switchgear. It is widely applied in power plants, substations, industrial zones, and commercial buildings, where safety, low maintenance, and long service life are essential.

This model is known for its spring-operated mechanism, modular design, and high endurance under frequent operations, making it a popular choice for panel builders and utility engineers.

🔧 Product Highlights

Rated Voltage: 12kV (suitable for 11kV systems)
Rated Current: 630A / 1250A / 1600A
Breaking Capacity: 20kA / 25kA / 31.5kA
Insulation Medium: Vacuum interrupter + air-insulated housing
Operation Mechanism: Manual or motor-charged spring mechanism
Mounting Options: Fixed-mounted or truck-type (drawout)

🌍 Typical Applications

Indoor switchgear for power distribution in utilities
Protection for transformers, capacitor banks, and motors
Medium voltage panels in commercial buildings or hospitals
OEM switchgear assembly (compatible with KYN28, XGN, etc.)

The ZN63 is especially suitable for frequent switching operations, with a mechanical life rated for over 10,000 operations.

📐 Technical Specifications

Parameter	Value
Rated Voltage	12kV
Rated Frequency	50Hz
Rated Current	630A / 1250A / 1600A
Short-Circuit Breaking Capacity	20 / 25 / 31.5kA
Short-Circuit Making Capacity	50 / 63 / 80kA (peak)
Mechanical Life	≥10,000 operations
Rated Short-Time Withstand	4s / 25kA
Rated Lightning Impulse	75kV
Auxiliary Voltage (motor)	AC/DC 110V or 220V
Standards	IEC 62271-100 / GB1984-2014

📎 Structural Options

Fixed-Mounted: For compact panels or static installations
Withdrawable Type: With racking truck for front-access switchgear
Integrated CT/PT Support: Optional for measurement and protection
Mechanical Interlocks: Prevent racking errors and enhance safety

ZN63(VS1)-12 Indoor 11kV Vacuum Circuit Breaker

❓ Frequently Asked Questions

• Is ZN63(VS1)-12 suitable for retrofit projects?
Yes. It can be customized to replace ABB VD4, Schneider HVX, or similar frames.

• Can this breaker handle frequent operation?
Definitely. It is rated for over 10,000 mechanical operations, ideal for motor or capacitor switching.

• Does it support IEC 61850-based control?
While the breaker itself is mechanical, it can be combined with digital protection relays for full IEC 61850 compliance.

• Is it compatible with KYN28A switchgear?
Yes. We offer matching trucks and contact arms for KYN28, XGN, and similar cubicles.

• Can I get drawings for the panel layout?
Yes. CAD drawings and panel interface dimensions are available upon request.